Greenheck Fan manual GB-141 G-143, Maximum BHP AT a Given RPM = RPM/16763

Roof Downblast - Exhaust

Belt & Direct Drive

GB-141 • G-143

283⁄8

(721)

	*233⁄4
	(603)	(Pa)
4	(102)	Pressure
	13⁄4 (44)	Static
22
(559)

Damper Size = 16 x 16 (406 x 406) Roof Opening = 181/2 x 181/2 (470 x 470) Shroud Thickness = 0.051 (1.3) Motor Cover Thickness = 0.040 (1.0) Curb Cap Thickness = 0.064 (1.6)

^Approximate Unit Weight G/GB = 77/86 lbs. (35/39 kg)

All dimensions in inches (millimeters).. *May be greater depending on motor. ^Weight shown is largest cataloged Open Drip-Proof motor.

RPM (Belt)

RPM (Direct)

RPM (Vari-Green)

HP

Density 0.075 lb/ft3

Density 1.2 kg/m3

E

V

R

U

wg)

M

C

E

T

(in.

S

Y

Pressure

S

S

I

F

T

H

O

F

T

E

L

Static

E

O

T

H

T

T

C

E

L

E

S

T

O

N

O

D

Volume (cfm)

		3
Direct Drive RPM
C-860 RPM	B-1140 RPM	A-1725 RPM	VG-1550 RPM

	Motor HP			Fan
Belt		Direct		RPM
141		143		580
		VG-		720
		3/4
1/4
		DC motor.	C-1/8	860
				950
		brushless
				1075
		direct drive
1/3			B-1/3	1140
		-Green is a
				1265
1/2		-Vari
		VG		1360
				1450
3/4
				1550
1			A-1	1725

	0	0..125
CFM		855
	1076
BHP	0..04	0..04
Sones	4..7	4..7
CFM	1336	1169
BHP	0..07	0..08
Sones	5..8	5..9
CFM	1595	1457
BHP	0..12	0..13
Sones	7..1	7..0
CFM	1762	1636
BHP	0..16	0..17
Sones	8..1	8..0
CFM	1994	1882
BHP	0..24	0..25
Sones	10..0	9..9
CFM	2115	2008
BHP	0..28	0..30
Sones	11..0	10..9
CFM	2347	2250
BHP	0..39	0..40
Sones	12..9	12..7
CFM	2523	2433
BHP	0..48	0..50
Sones	14..6	14..3
CFM	2690	2606
BHP	0..58	0..60
Sones	16..2	15..9
CFM	2875	2797
BHP	0..71	0..73
Sones	17..7	18..0
CFM	3200	3129
BHP	0..98	1..00
Sones	20..0	21..0

	Static Pressure in Inches wg
0..25	0..375	0..5		0..75		1	1..25	1..5	1..75
			MAXIMUM BHP AT A GIVEN RPM = (RPM/1676)3
				MAXIMUM RPM - GB-141=1725, G-143=1725
938					TIP SPEED (ft/min) = RPM x 3.829
0..08					MAXIMUM MOTOR FRAME SIZE = 145T
5..2
1304	1085
0..13	0..13
6..6	6..1
1506	1344	1085
0..18	0..18	0..17
7..6	7..1	6..5
1771	1647	1490
0..26	0..26	0..26
9..4	8..9	8..4
1905	1792	1660			1233
0..31	0..31	0..31			0..29
10..4	9..9	9..4			8..2
2158	2062	1955			1677	1048
0..41	0..42	0..42			0..42	0..35
12..3	11..9	11..4			10..4	8..8
2347	2259	2166			1943	1602
0..51	0..52	0..52			0..53	0..51
13..9	13..5	13..1			12..2	11..0
2524	2443	2358			2165	1905	1501
0..61	0..63	0..63			0..64	0..63	0..59
15..6	15..2	14..7			13..8	12..9	11..7
2719	2644	2566			2396	2191	1910	1297
0..74	0..76	0..77			0..78	0..79	0..76	0..65
17..4	17..2	16..8			15..0	14..8	14..8	14..9
3059	2991	2923			2782	2619	2427	2184	1815
1..02	1..03	1..05			1..07	1..07	1..09	1..06	1..00
20..0	19..9	19..6			18..5	17..2	17..0	16..8	16..7

Performance certified is for installation type A: Free inlet, Free outlet. Power rating (BHP) does not include transmission losses. Performance ratings include the effects of a birdscreen. The sound ratings shown are loudness values in hemispherical sones at 5 ft. (1.5 m) in a hemispherical free field calculated per AMCA Standard 301. Values shown are for installation type A: free inlet hemispherical sone levels.

25